Lifting-jack



(No Model.)

G. F. KALBR.

LIPTING JACK.

Nof 352,650. v Patented Nov. 16,1886` N, PETERS. PhulrrLilhognphur. Washingum ILCV NiTED STATES PATENT OFFICE.

GEORGE E. KALER, OE ROOKLAND, MAINE.

" lFTlNe-JACK.

SPECIFICATION forming part of Letters Patent No. 352,650, dated November 16, 1886.

` Application filed August 12, 1886. Serial No. 210,717. (No model.)

To all whom it may concern,.-

Beit known that I, GEORGE F. KALER, residing at Rockland, in the county of Knox and State of Maine, have invented certain new and useful Improvements in Garriage- Jacks, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention relates to lifting-jacks for carriages or wagons; and it consists in the carriage-j ack constructed substantially as hereinafter described and claimed, by which the en` tire body of a carriage may be lifted at once, so that any or all of the wheels may be readily removed or replaced.

In the drawings, Figure 1 is a perspective Yview of my carriage-lifting jack. Fig. 2 is a side elevation showing the depressed position in dotted lines.

The letters A A indicate Vthe base-pieces or stringers which form the foundation of this jack. The stringers are held together by the ties B B, and` preferably have small trucks at their front ends.

At one end of the jack two braces, C C, are pivoted to the stringers AA, and the upper ends of these braces are pivoted to the top bars, D D. The bars D D are substantially counterparts of the stringers A A, and are held parallel to each other by the ties E E.

At or near the other end of the jack from the braces C pairs of links F F are pivoted to the top bars, D D. The lower ends of these links are pivoted to the bent levers G Gat f f, a short distance above the pointsg g, where these bent levers G G are pivoted to the stringers A A. The levers G G terminate at their outer ends in handles H H. Thus the links' F F and the parts of levers between thelower ends of said links and the pivots g g form toggle-levers between the stringers A A and the top bars, D D. The rigid draw-bars I I connect the pivots f f of these toggle-levers with bear against the ends K of thc bars D at the time the toggle-joint has been carried to aposition a little past the perpendicular. This Contact of the levers with the top bars holds the jack rmly in elevated position, no other looking device being necessary.

To lower the carriage-body or other weight which has been lifted, it is only necessary to swing back the lcvels G G.

This device, by reason of the compound leverage afforded, is very powerful, and can be quickly broughtinto position for lifting a carriage-body or other similar weight.

It is apparent that one-half of the device, as shown in Fig. 2, will be operative for use in certain positions.

yI claim- -I. The combination of the stringers andthe top bar, the pivoted brace, as 0,connecting the same at one end, the toggle-lever forming the other end counection,and a rigid bar connecting the toggle leve-r with the brace,so that the top bar will be lifted by the movement of the toggle-levers, substantially as described.

2. The combination, with the stringersA A and top bars, B B, tied in pairs, as described, of the braces C C, and the toggle-levers pivotally connected to said stringers and bars, the handles H forming extensions of thelower members of the toggle -ievers, said handles moving in line with the top bars, and the draw-bars I connecting the pivot of the toggle-levers with the pivoted braces, all substantially as described.

In testimony whereof I affix my signature in presence of two witnesses. A

GEORGE F. KALER.

Witnesses:

J. W. CROOKER, J. B. HOWARD. 

